Proposed is a method for encoding an image of a video sequence, the image including at least two components, including a component representative of the luminance and a component representative of the chrominance, each component being partitioned into blocks, wherein the method involves encoding at least one block of the chrominance component using a BDPCM mode.
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2. The method according to claim 1, wherein the encoding of the at least one said block of the first chrominance component is performed using the BDPCM mode when a predetermined criterion is met.
3. The method according to claim 2, wherein the criterion is an encoding criterion indicative of a choice made by an encoder configured to implement said encoding method.
4. The method according to claim 3, wherein the choice made by the encoder results from an analysis of the video sequence.
7. The method according to claim 6, wherein said value decoded from said information also indicates a direction allowing, from respective block predictors, as a function of said direction, decoding the at least one block of said first chrominance component and the corresponding block of the second chrominance component.
9. The method according to claim 8, wherein said value decoded from the second information also indicates a direction allowing, from respective block predictors, as a function of said direction, decoding the block of the first chrominance component and the corresponding said block of the second chrominance component.
10. The method according to claim 8, further comprising decoding another information indicating, for at least one said block of the second chrominance component, whether said block of the second chrominance component is encoded using the BDPCM mode.
11. The method according to claim 8, wherein the encoding criterion is indicative of a choice made by an encoder having encoded said video data stream.
12. The method according to claim 11, wherein the choice made by the encoder results from an analysis of the video data stream.
14. The method according to claim 13, further comprising, when the second information relating to said image indicates that the BDPCM mode is able to be used to decode the at least one block of the first chrominance component of the image, decoding an indicator relating to the at least one block of the first chrominance component, indicating whether the BDPCM mode is used to decode said at least one block of the first chrominance component.
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June 24, 2020
October 8, 2024
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